X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/328c5688dbe0f4c14418f22350ccd99b3fe8ac71..a85c067ba6c6940512cf57ec213277a370d87e70:/src/src/spool_mbox.c

diff --git a/src/src/spool_mbox.c b/src/src/spool_mbox.c
index 8ca468a85..d9767ec3c 100644
--- a/src/src/spool_mbox.c
+++ b/src/src/spool_mbox.c
@@ -4,7 +4,8 @@
 
 /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003 - 2015
  * License: GPL
- * Copyright (c) The Exim Maintainers 2016
+ * Copyright (c) The Exim Maintainers 2016 - 2021
+ * SPDX-License-Identifier: GPL-2.0-only
  */
 
 /* Code for setting up a MBOX style spool file inside a /scan/<msgid>
@@ -35,19 +36,16 @@ uschar message_subdir[2];
 uschar buffer[16384];
 uschar *temp_string;
 uschar *mbox_path;
-FILE *mbox_file = NULL;
-FILE *data_file = NULL;
-FILE *yield = NULL;
-header_line *my_headerlist;
+FILE *mbox_file = NULL, *l_data_file = NULL, *yield = NULL;
 struct stat statbuf;
-int i, j;
-void *reset_point;
+int j;
+rmark reset_point;
 
 mbox_path = string_sprintf("%s/scan/%s/%s.eml",
   spool_directory, message_id, message_id);
 if (mbox_fname) *mbox_fname = mbox_path;
 
-reset_point = store_get(0);
+reset_point = store_mark();
 
 /* Skip creation if already spooled out as mbox file */
 if (!spool_mbox_ok)
@@ -56,8 +54,8 @@ if (!spool_mbox_ok)
   temp_string = string_sprintf("scan/%s", message_id);
   if (!directory_make(spool_directory, temp_string, 0750, FALSE))
     {
-    log_write(0, LOG_MAIN|LOG_PANIC, "%s", string_open_failed(errno,
-      "scan directory %s/scan/%s", spool_directory, temp_string));
+    log_write(0, LOG_MAIN|LOG_PANIC, "%s",
+      string_open_failed("scan directory %s/scan/%s", spool_directory, temp_string));
     goto OUT;
     }
 
@@ -65,8 +63,8 @@ if (!spool_mbox_ok)
 
   if (!(mbox_file = modefopen(mbox_path, "wb", SPOOL_MODE)))
     {
-    log_write(0, LOG_MAIN|LOG_PANIC, "%s", string_open_failed(errno,
-      "scan file %s", mbox_path));
+    log_write(0, LOG_MAIN|LOG_PANIC, "%s",
+      string_open_failed("scan file %s", mbox_path));
     goto OUT;
     }
 
@@ -90,7 +88,7 @@ if (!spool_mbox_ok)
 
   /* write all non-deleted header lines to mbox file */
 
-  for (my_headerlist = header_list; my_headerlist;
+  for (header_line * my_headerlist = header_list; my_headerlist;
       my_headerlist = my_headerlist->next)
     if (my_headerlist->type != '*')
       if (fwrite(my_headerlist->text, my_headerlist->slen, 1, mbox_file) != 1)
@@ -108,21 +106,25 @@ if (!spool_mbox_ok)
     goto OUT;
     }
 
-  /* copy body file */
-  if (!source_file_override)
+  /* Copy body file.  If the main receive still has it open then it is holding
+  a lock, and we must not close it (which releases the lock), so just use the
+  global file handle. */
+  if (source_file_override)
+    l_data_file = Ufopen(source_file_override, "rb");
+  else if (spool_data_file)
+    l_data_file = spool_data_file;
+  else
     {
     message_subdir[1] = '\0';
-    for (i = 0; i < 2; i++)
+    for (int i = 0; i < 2; i++)
       {
-      message_subdir[0] = split_spool_directory == (i == 0) ? message_id[5] : 0;
+      set_subdir_str(message_subdir, message_id, i);
       temp_string = spool_fname(US"input", message_subdir, message_id, US"-D");
-      if ((data_file = Ufopen(temp_string, "rb"))) break;
+      if ((l_data_file = Ufopen(temp_string, "rb"))) break;
       }
     }
-  else
-    data_file = Ufopen(source_file_override, "rb");
 
-  if (!data_file)
+  if (!l_data_file)
     {
     log_write(0, LOG_MAIN|LOG_PANIC, "Could not open datafile for message %s",
       message_id);
@@ -131,31 +133,31 @@ if (!spool_mbox_ok)
 
   /* The code used to use this line, but it doesn't work in Cygwin.
 
-      (void)fread(data_buffer, 1, 18, data_file);
-    
+      (void)fread(data_buffer, 1, 18, l_data_file);
+
      What's happening is that spool_mbox used to use an fread to jump over the
      file header. That fails under Cygwin because the header is locked, but
      doing an fseek succeeds. We have to output the leading newline
      explicitly, because the one in the file is parted of the locked area.  */
 
   if (!source_file_override)
-    (void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET);
+    (void)fseek(l_data_file, SPOOL_DATA_START_OFFSET, SEEK_SET);
 
   do
     {
     uschar * s;
 
-    if (!spool_file_wireformat || source_file_override)
-      j = fread(buffer, 1, sizeof(buffer), data_file);
+    if (!f.spool_file_wireformat || source_file_override)
+      j = fread(buffer, 1, sizeof(buffer), l_data_file);
     else						/* needs CRLF -> NL */
-      if ((s = fgets(buffer, sizeof(buffer), data_file)))
+      if ((s = US fgets(CS buffer, sizeof(buffer), l_data_file)))
 	{
 	uschar * p = s + Ustrlen(s) - 1;
 
 	if (*p == '\n' && p[-1] == '\r')
 	  *--p = '\n';
 	else if (*p == '\r')
-	  ungetc(*p--, data_file);
+	  ungetc(*p--, l_data_file);
 
 	j = p - buffer;
 	}
@@ -184,13 +186,13 @@ if (!spool_mbox_ok)
 if (  !(yield = Ufopen(mbox_path,"rb"))
    || fstat(fileno(yield), &statbuf) != 0
    )
-  log_write(0, LOG_MAIN|LOG_PANIC, "%s", string_open_failed(errno,
-    "scan file %s", mbox_path));
+  log_write(0, LOG_MAIN|LOG_PANIC, "%s",
+    string_open_failed( "scan file %s", mbox_path));
 else
   *mbox_file_size = statbuf.st_size;
 
 OUT:
-if (data_file) (void)fclose(data_file);
+if (l_data_file && !spool_data_file) (void)fclose(l_data_file);
 if (mbox_file) (void)fclose(mbox_file);
 store_reset(reset_point);
 return yield;
@@ -207,40 +209,38 @@ unspool_mbox(void)
 spam_ok = 0;
 malware_ok = 0;
 
-if (spool_mbox_ok && !no_mbox_unspool)
+if (spool_mbox_ok && !f.no_mbox_unspool)
   {
-  uschar *mbox_path;
   uschar *file_path;
-  struct dirent *entry;
   DIR *tempdir;
+  rmark reset_point = store_mark();
+  uschar * mbox_path = string_sprintf("%s/scan/%s", spool_directory, spooled_message_id);
 
-  mbox_path = string_sprintf("%s/scan/%s", spool_directory, spooled_message_id);
-
-  tempdir = opendir(CS mbox_path);
-  if (!tempdir)
+  if (!(tempdir = exim_opendir(mbox_path)))
     {
     debug_printf("Unable to opendir(%s): %s\n", mbox_path, strerror(errno));
     /* Just in case we still can: */
-    rmdir(CS mbox_path);
+    (void) rmdir(CS mbox_path);
     return;
     }
   /* loop thru dir & delete entries */
-  while((entry = readdir(tempdir)) != NULL)
+  for (struct dirent *entry; entry = readdir(tempdir); )
     {
     uschar *name = US entry->d_name;
-    int dummy;
     if (Ustrcmp(name, US".") == 0 || Ustrcmp(name, US"..") == 0) continue;
 
     file_path = string_sprintf("%s/%s", mbox_path, name);
     debug_printf("unspool_mbox(): unlinking '%s'\n", file_path);
-    dummy = unlink(CS file_path);
+    if (unlink(CS file_path) != 0)
+      log_write(0, LOG_MAIN|LOG_PANIC, "unlink(%s): %s", file_path, strerror(errno));
     }
 
   closedir(tempdir);
 
   /* remove directory */
-  rmdir(CS mbox_path);
-  store_reset(mbox_path);
+  if (rmdir(CS mbox_path) != 0)
+    log_write(0, LOG_MAIN|LOG_PANIC, "rmdir(%s): %s", mbox_path, strerror(errno));
+  store_reset(reset_point);
   }
 spool_mbox_ok = 0;
 }